View thumbnail of SVG in documentlibrary?

[gronfelt]

Whenever a folder containing SVG-files is viewed in the Document Library Alfresco throws an error claiming that svg to png conversion is not supported:

11:38:54,849 ERROR [org.alfresco.web.scripts.AbstractRuntime] Exception from executeScript - redirecting to status template error: 09290027 Wrapped Exception (with status template): 09290026 Failed to execute script '/org/alfresco/repository/thumbnail/thumbnail.get.js (in classpath store file:/opt/Alfresco/tomcat/webapps/alfresco/WEB-INF/classes/alfresco/templates/webscripts)': 09290025 Thumbnail could not be created as required transformation is not supported from image/svg to image/png
org.alfresco.web.scripts.WebScriptException: 09290027 Wrapped Exception (with status template): 09290026 Failed to execute script '/org/alfresco/repository/thumbnail/thumbnail.get.js (in classpath store file:/opt/Alfresco/tomcat/webapps/alfresco/WEB-INF/classes/alfresco/templates/webscripts)': 09290025 Thumbnail could not be created as required transformation is not supported from image/svg to image/png
   at org.alfresco.web.scripts.AbstractWebScript.createStatusException(AbstractWebScript.java:613)
   at org.alfresco.repo.web.scripts.content.StreamContent.execute(StreamContent.java:211)
   at org.alfresco.repo.web.scripts.RepositoryContainer$2.execute(RepositoryContainer.java:371)
   at org.alfresco.repo.transaction.RetryingTransactionHelper.doInTransaction(RetryingTransactionHelper.java:326)
   at org.alfresco.repo.web.scripts.RepositoryContainer.transactionedExecute(RepositoryContainer.java:421)
   at org.alfresco.repo.web.scripts.RepositoryContainer.transactionedExecuteAs(RepositoryContainer.java:438)
   at org.alfresco.repo.web.scripts.RepositoryContainer.executeScript(RepositoryContainer.java:302)
   at org.alfresco.web.scripts.AbstractRuntime.executeScript(AbstractRuntime.java:295)
   at org.alfresco.web.scripts.AbstractRuntime.executeScript(AbstractRuntime.java:172)
   at org.alfresco.web.scripts.servlet.WebScriptServlet.service(WebScriptServlet.java:122)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
   at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
   at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
   at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
   at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
   at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
   at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
   at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845)
   at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
   at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
   at java.lang.Thread.run(Thread.java:619)
Caused by: org.alfresco.scripts.ScriptException: 09290026 Failed to execute script '/org/alfresco/repository/thumbnail/thumbnail.get.js (in classpath store file:/opt/Alfresco/tomcat/webapps/alfresco/WEB-INF/classes/alfresco/templates/webscripts)': 09290025 Thumbnail could not be created as required transformation is not supported from image/svg to image/png
   at org.alfresco.repo.jscript.RhinoScriptProcessor.execute(RhinoScriptProcessor.java:178)
   at org.alfresco.repo.processor.ScriptServiceImpl.executeScript(ScriptServiceImpl.java:274)
   at org.alfresco.repo.web.scripts.RepositoryScriptProcessor.executeScript(RepositoryScriptProcessor.java:108)
   at org.alfresco.web.scripts.AbstractWebScript.executeScript(AbstractWebScript.java:819)
   at org.alfresco.repo.web.scripts.content.StreamContent.execute(StreamContent.java:157)
   … 21 more
Caused by: org.alfresco.service.cmr.thumbnail.ThumbnailException: 09290025 Thumbnail could not be created as required transformation is not supported from image/svg to image/png
   at org.alfresco.repo.thumbnail.ThumbnailServiceImpl$1.doWork(ThumbnailServiceImpl.java:260)
   at org.alfresco.repo.thumbnail.ThumbnailServiceImpl$1.doWork(ThumbnailServiceImpl.java:180)
   at org.alfresco.repo.security.authentication.AuthenticationUtil.runAs(AuthenticationUtil.java:503)
   at org.alfresco.repo.thumbnail.ThumbnailServiceImpl.createThumbnail(ThumbnailServiceImpl.java:178)
   at org.alfresco.repo.thumbnail.ThumbnailServiceImpl.createThumbnail(ThumbnailServiceImpl.java:146)
   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
   at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
   at java.lang.reflect.Method.invoke(Method.java:597)
   at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:304)
   at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:182)
   at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:149)
   at org.alfresco.repo.security.permissions.impl.AlwaysProceedMethodInterceptor.invoke(AlwaysProceedMethodInterceptor.java:40)
   at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
   at org.alfresco.repo.security.permissions.impl.ExceptionTranslatorMethodInterceptor.invoke(ExceptionTranslatorMethodInterceptor.java:49)
   at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
   at org.alfresco.repo.audit.AuditMethodInterceptor.proceed(AuditMethodInterceptor.java:189)
   at org.alfresco.repo.audit.AuditMethodInterceptor.invoke(AuditMethodInterceptor.java:152)
   at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
   at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:106)
   at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
   at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
   at $Proxy99.createThumbnail(Unknown Source)
   at org.alfresco.repo.jscript.ScriptNode.createThumbnail(ScriptNode.java:2207)
   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
   at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
   at java.lang.reflect.Method.invoke(Method.java:597)
   at org.mozilla.javascript.MemberBox.invoke(MemberBox.java:155)
   at org.mozilla.javascript.NativeJavaMethod.call(NativeJavaMethod.java:243)
   at org.mozilla.javascript.optimizer.OptRuntime.call2(OptRuntime.java:76)
   at org.mozilla.javascript.gen.c10._c1(file:/opt/Alfresco/tomcat/webapps/alfresco/WEB-INF/classes/alfresco/templates/webscripts/org/alfresco/repository/thumbnail/thumbnail.get.js:61)
   at org.mozilla.javascript.gen.c10.call(file:/opt/Alfresco/tomcat/webapps/alfresco/WEB-INF/classes/alfresco/templates/webscripts/org/alfresco/repository/thumbnail/thumbnail.get.js)
   at org.mozilla.javascript.optimizer.OptRuntime.callName0(OptRuntime.java:108)
   at org.mozilla.javascript.gen.c10._c0(file:/opt/Alfresco/tomcat/webapps/alfresco/WEB-INF/classes/alfresco/templates/webscripts/org/alfresco/repository/thumbnail/thumbnail.get.js:101)
   at org.mozilla.javascript.gen.c10.call(file:/opt/Alfresco/tomcat/webapps/alfresco/WEB-INF/classes/alfresco/templates/webscripts/org/alfresco/repository/thumbnail/thumbnail.get.js)
   at org.mozilla.javascript.ContextFactory.doTopCall(ContextFactory.java:393)
   at org.mozilla.javascript.ScriptRuntime.doTopCall(ScriptRuntime.java:2834)
   at org.mozilla.javascript.gen.c10.call(file:/opt/Alfresco/tomcat/webapps/alfresco/WEB-INF/classes/alfresco/templates/webscripts/org/alfresco/repository/thumbnail/thumbnail.get.js)
   at org.mozilla.javascript.gen.c10.exec(file:/opt/Alfresco/tomcat/webapps/alfresco/WEB-INF/classes/alfresco/templates/webscripts/org/alfresco/repository/thumbnail/thumbnail.get.js)
   at org.alfresco.repo.jscript.RhinoScriptProcessor.executeScriptImpl(RhinoScriptProcessor.java:457)
   at org.alfresco.repo.jscript.RhinoScriptProcessor.execute(RhinoScriptProcessor.java:174)
   … 25 more
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How can I fix this? Since ImageMagick can convert from SVG to PNG it seems to me that I should be able to tell Alfresco to perform that conversion somehow, but I don't know where to look.

[zaizi]

Looks like Alfresco explicitly do not support the transformation in org.alfresco.repo.content.transform.magick.AbstractImageMagickContentTransformer. If you can get it to work, you are going to have to override the method and provide your own transformer implementation.

    /**
     * Some image formats are not supported by ImageMagick, or at least appear not to work.
     * 
     * @param mimetype the mimetype to check
     * @return Returns true if ImageMagic can handle the given image format
     */
    public static boolean isSupported(String mimetype)
    {
        if (!mimetype.startsWith(MIMETYPE_IMAGE_PREFIX))
        {
            return false;   // not an image
        }
        else if (mimetype.equals(MimetypeMap.MIMETYPE_IMAGE_RGB))
        {
            return false;   // rgb extension doesn't work
        }
        else if (mimetype.equals(MimetypeMap.MIMETYPE_IMAGE_SVG))
        {
            return false;   // svg extension doesn't work
        }
        else
        {
            return true;
        }
    }‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

[gronfelt]

Thanks for that, I guess it's not as easy as I had hoped then.

It seems a bit odd though that Alfresco can't handle this in a better way than throwing an exception every time the situation occurs.

[rasm]

Although this is an old thread,

Try this module http://code.google.com/p/alfresco-svg/ . It has thumbnailing, preview and indexing support

Performance could be tweaked, because thumbnails are generated for all definitions